CVE-2026-4480

Summary

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:4.23.5-109.el10_2 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:4.21.3-114.el10_0.1 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:4.10.16-26.el7_9.1 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:4.10.16-26.el7_9.1 < *unaffected
Red HatRed Hat Enterprise Linux 80:4.19.4-16.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 80:4.19.4-16.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:4.13.3-12.el8_4.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:4.13.3-12.el8_4.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:4.15.5-16.el8_6.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:4.15.5-16.el8_6.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:4.17.5-7.el8_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:4.17.5-7.el8_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 90:4.23.5-10.el9_8 < *unaffected
Red HatRed Hat Enterprise Linux 90:4.23.5-10.el9_8 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:4.17.5-105.el9_2.5 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:4.19.4-105.el9_4.4 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:4.21.3-14.el9_6.1 < *unaffected

Weaknesses

  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Workarounds

Remove &#34;%J&#34; from the "print command" in smb.conf entry.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

samba: Samba: Remote Code Execution in printing subsystem via unescaped job description

Additional References

References